Licence key activation
Paste your licence key into extension settings to unlock unlimited alerts, filters, schedules, trends, and customisation.
Premium
Unlock smarter alerts for Prolific.
Built for people who want less noise and better study timing.
Premium adds unlimited external alerts, smart filters, schedule planning insights, and local study trends while milestones and core alerts remain available for free.
Try it free, then unlock Premium when you want unlimited alerts and more control.
Smart filtersAlert schedulesUnlimited alertsLocal study trendsLifetime accessFree trial available
Free vs Premium
Free gets you started.Premium removes the limits.
Use the free version for core alerts, local milestones, help and feedback, and 15 external alerts per rolling 24-hour period. Premium adds unlimited external alerts, smarter filters, schedule planning, customisation, and local study trends.
| Feature | Free | Premium£4.99 one-time paymentLifetime access |
|---|---|---|
| Monitor your open Prolific studies page | Included | Included |
| Manual check button | Included | Included |
| Browser notifications and sound alerts | Included | Included |
| Non-sensitive settings backup | Included | Included |
| Local milestones and progress | Included | Included |
| Discord, Telegram, and Pushover alerts | 15 per rolling 24-hour period | Unlimited alerts |
| Filter profiles with separate GBP/USD rules | - | Included |
| Profile-based alert schedules | - | Included |
| Historical schedule-coverage estimate | - | Included |
| Custom alert sound and accent colour | - | Included |
| Local-first Study Trends with CSV transfer | - | Included |
Licence key
How your Premium licence works.
After purchase, you will receive a licence key from Lemon Squeezy. Paste it into StudyChime settings to activate Premium on your browser. Premium settings are applied locally once the licence is verified.
Licence and quota checks
StudyChime occasionally checks your licence and quota status with the licence service so Premium access stays valid and free alert limits can be applied.
Offline grace period
If there is a short outage after a successful check, StudyChime can keep Premium active during its offline grace period.
14-day refund policy
If Premium was purchased by mistake or does not work in your browser setup, contact support within 14 days.
Features
Premium features.
Premium is for people who want fewer noisy alerts, better timing, and more control over which Prolific studies deserve attention.
Unlimited external alerts
Remove the rolling 24-hour alert quota for Discord, Telegram, and Pushover.
Filter profiles
Save filters and schedules together. Use independent GBP and USD pay rules, availability and time limits, Any or Every matching for included keywords, and excluded keywords.
Alert schedules
Add multiple daily windows, see the next window, and use a local estimate of how much of your previously observed matched-study history the schedule would have covered.
Study trends
Select Study trends in the popup to explore local observations for up to one year, with GBP and USD values kept separate and CSV import/export.
Customisation
Use Appearance & sound to choose an accent colour or custom alert sound, with test, reset, and remove actions.
Try before buying
Start a free Premium trial from extension settings before deciding whether to buy.
Ready to unlock Premium?
Get unlimited external alerts, smarter filters, alert schedules, local trends, and customisation for a one-time payment.
Lifetime access. Free trial available. 14-day refund window.